linux-kernel - [PATCH 4.5 200/238] mmc: tegra: Disable UHS-I modes for tegra114

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Date:	Sun, 10 Apr 2016 11:36:17 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Jon Hunter <jonathanh@...dia.com>,
	Lucas Stach <dev@...xeye.de>,
	Thierry Reding <treding@...dia.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Ulf Hansson <ulf.hansson@...aro.org>
Subject: [PATCH 4.5 200/238] mmc: tegra: Disable UHS-I modes for tegra114

4.5-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jon Hunter <jonathanh@...dia.com>

commit 7bf037d6ac4768e228e337afd7b6c6d98f947f9f upstream.

SD card support for Tegra114 started failing after commit a8e326a911d3
("mmc: tegra: implement module external clock change") was merged. This
commit was part of a series to enable UHS-I modes for Tegra. To
workaround this problem for now, disable UHS-I modes for Tegra114 by
separating the soc data structures for Tegra114 and Tegra124 so that
UHS-I is still enabled for Tegra124 but not Tegra114.

Fixes: a8e326a911d3 ("mmc: tegra: implement module external clock change")
Signed-off-by: Jon Hunter <jonathanh@...dia.com>
Reviewed-by: Lucas Stach <dev@...xeye.de>
Acked-by: Thierry Reding <treding@...dia.com>
Acked-by: Adrian Hunter <adrian.hunter@...el.com>
Signed-off-by: Ulf Hansson <ulf.hansson@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/mmc/host/sdhci-tegra.c |   12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

--- a/drivers/mmc/host/sdhci-tegra.c
+++ b/drivers/mmc/host/sdhci-tegra.c
@@ -147,10 +147,16 @@ static void tegra_sdhci_reset(struct sdh
 	/* Advertise UHS modes as supported by host */
 	if (soc_data->nvquirks & NVQUIRK_ENABLE_SDR50)
 		misc_ctrl |= SDHCI_MISC_CTRL_ENABLE_SDR50;
+	else
+		misc_ctrl &= ~SDHCI_MISC_CTRL_ENABLE_SDR50;
 	if (soc_data->nvquirks & NVQUIRK_ENABLE_DDR50)
 		misc_ctrl |= SDHCI_MISC_CTRL_ENABLE_DDR50;
+	else
+		misc_ctrl &= ~SDHCI_MISC_CTRL_ENABLE_DDR50;
 	if (soc_data->nvquirks & NVQUIRK_ENABLE_SDR104)
 		misc_ctrl |= SDHCI_MISC_CTRL_ENABLE_SDR104;
+	else
+		misc_ctrl &= ~SDHCI_MISC_CTRL_ENABLE_SDR104;
 	sdhci_writel(host, misc_ctrl, SDHCI_TEGRA_VENDOR_MISC_CTRL);
 
 	clk_ctrl = sdhci_readl(host, SDHCI_TEGRA_VENDOR_CLOCK_CTRL);
@@ -335,6 +341,10 @@ static const struct sdhci_pltfm_data sdh
 
 static const struct sdhci_tegra_soc_data soc_data_tegra114 = {
 	.pdata = &sdhci_tegra114_pdata,
+};
+
+static const struct sdhci_tegra_soc_data soc_data_tegra124 = {
+	.pdata = &sdhci_tegra114_pdata,
 	.nvquirks = NVQUIRK_ENABLE_SDR50 |
 		    NVQUIRK_ENABLE_DDR50 |
 		    NVQUIRK_ENABLE_SDR104,
@@ -357,7 +367,7 @@ static const struct sdhci_tegra_soc_data
 
 static const struct of_device_id sdhci_tegra_dt_match[] = {
 	{ .compatible = "nvidia,tegra210-sdhci", .data = &soc_data_tegra210 },
-	{ .compatible = "nvidia,tegra124-sdhci", .data = &soc_data_tegra114 },
+	{ .compatible = "nvidia,tegra124-sdhci", .data = &soc_data_tegra124 },
 	{ .compatible = "nvidia,tegra114-sdhci", .data = &soc_data_tegra114 },
 	{ .compatible = "nvidia,tegra30-sdhci", .data = &soc_data_tegra30 },
 	{ .compatible = "nvidia,tegra20-sdhci", .data = &soc_data_tegra20 },